SLAC klystrons modulators

The Stanford Linear Accelerator utilizes over 250, 5045 klystrons which are at driven by 35 year old modulator utilizing standard PFN capacitors, thyratrons and conventional pulse transformer to generate a 3.5 /spl mu/s pulse of 350 kV, 400 A, at 120 Hz. The proposal is to use a 10 section solid state induction modulator to replace the existing PFN/thyratron modulator, and drive the klystron using the existing conventional pulse transformer. The induction modulator utilizes a pulse transformer similar to an induction accelerator driven by solid state high voltage IGBT switches and DC capacitors. The performance and test results of the IGBT, induction modulator driving a conventional transformer with a 5045 klystron load is discussed.